# US 11,992,802 B2 · Process and apparatus for the reversible adsorbtion of carbon dioxide

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- Number: US 11,992,802 B2
- Document ID: US11992802B2
- Status: Granted
- Kind: B2
- Application number: 17/861,648
- Filed: 2022-07-11
- Published: 2022-10-27
- Granted: 2024-05-28
- Earliest claimed: 2016-11-23
- Assignees: Skytree B.V.
- Applicants: Skytree B.V.
- Inventors: Max Beaumont; Piotr Thomasz Kasper; Ian Smith; Alexander Gunkel
- Web page: https://patentgrep.com/patent/US11992802B2

## CPC

- B01D 53/0415: {Beds in cartridges}
- B01D 53/0438: {Cooling or heating systems}
- B01D 53/0446: {Means for feeding or distributing gases}
- B01D 53/0462: {Temperature swing adsorption}
- C01B 32/50: Carbon dioxide
- B01D 2253/102: Carbon
- B01D 2253/104: Alumina
- B01D 2253/106: Silica or silicates
- B01D 2253/108: Zeolites
- B01D 2253/202: Polymeric adsorbents
- B01D 2253/206: Ion exchange resins
- B01D 2256/22: Carbon dioxide
- B01D 2257/504: Carbon dioxide
- B01D 2258/0283: Flue gases
- B01D 2258/06: Polluted air
- B01D 2259/4009: using hot gas
- B01D 2259/40096: by using electrical resistance heating
- Y02C 20/40: of CO2
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]

## Abstract

An apparatus (10, 110, 210, 310) for the separation and recovery of CO2, from air, by a cyclic adsorption/desorption process using a loose particulate sorbent for gas adsorption. The apparatus has a plurality of adjacent, parallel, spaced-apart layers (24, 124, 224, 324), each having a stiff frame supporting a flexible, gas-permeable fabric enclosure for the sorbent. The gas inlet (14, 114, 214, 314) and outlet (18, 118, 216, 316) of the apparatus are on its axially opposite sides, and each layer (24, 124, 224, 324) extending axially within the apparatus. The recovered CO2 can be either supplied to an enclosed space, recycled to an enclosed space, from which the CO2 had been separated, or vented to the exterior of the latter enclosed space.

## Claims

### Claim 1

An apparatus for providing CO2 to a greenhouse or a vivaria in increased concentration for enhancing plant growth, the apparatus comprising:
a vacuum chamber that contains a sorbent for cyclic adsorption and desorption of CO2, wherein the sorbent is adapted to:
i) initially adsorb CO2 from atmospheric air forced into the vacuum chamber to produce atmospheric air of reduced CO2 concentration in the vacuum chamber, and,
ii) subsequently be heated to desorb CO2 that the sorbent had adsorbed from the atmospheric air forced into the vacuum chamber and thereby produce atmospheric air of increased CO2 concentration in the vacuum chamber;
a first inlet of the vacuum chamber to the atmosphere for atmospheric air that is to be forced by a fan into the vacuum chamber;
a first outlet of the vacuum chamber to the atmosphere for the atmospheric air of reduced CO2 concentration that is to be forced by the fan from the vacuum chamber to the atmosphere;
a second outlet of the vacuum chamber to the green house or the vivaria for atmospheric air of increased CO2 concentration that is produced by heating the sorbent and is to be forced by the fan from the vacuum chamber to the greenhouse or the vivaria; and
a second inlet of the vacuum chamber to the greenhouse or the vivaria for air that is to be forced by the fan out of the greenhouse or the vivaria to the atmosphere via the vacuum chamber,
wherein the first and second outlets of the vacuum chamber comprise a single two-way outlet valve configured to direct air from the vacuum chamber to the atmosphere through the first outlet or to the greenhouse or vivaria through the second outlet wherein when the single two-way outlet valve directs air through the first outlet, the second outlet is blocked and when the single two-way outlet valve directs air through the second outlet, the first outlet is blocked, and
wherein the first and second inlets of the vacuum chamber comprise a single two-way inlet valve configured to direct air into the vacuum chamber from the atmosphere through the first inlet or from the greenhouse or vivaria through the second inlet wherein when the single two-way inlet valve directs air through the first inlet, the second inlet is blocked and when the single two-way outlet valve directs air through the second inlet, the first inlet is blocked.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the sorbent is a loose particulate sorbent.